Assessment of functional and anatomical imaging assessed by PET and cardiac MRI in diabetic cardiomyopathy

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To assess whether diabetic cardiomyopathy (DMCM) is related to myocardial blood flow or flow reserve, 5 patients with low LVEF<45% (DMCM) and 12 patients with DM control (DMc) with normal LVEF underwent N-13 ammonia PET and cardiac MRI(CMR). Stress, rest myocardial blood flow (sMBF, rMBF) and myocardial flow reserve (MFR) by PET and EDV, ESV and EF by CMR were evaluated. There was no significant difference in routine clinical blood data, but significant difference in HbA1c (DMCM<DMc). There was no significant difference in sMBF, rMBF and MFR between the 2 groups. MFR was not correlated with LVEF, but showed negative correlation with age among the all patients. In conclusion, MBF or MFR is not likely to be a factor of pathogenesis for DMCM.